At that point, several marshals tackled Mumford, stunned him with a Taser and took him into custody.

"I just turned to [the marshals] and said show me what papers you have. Then, the next thing I know they surrounded me, took ahold of me, and they were talking about I was resisting arrest," Mumford said. "They twisted my legs, put me to the ground, then tased me."

"There was like eight of them on him and they tased him," Cox said. "It's unreal. How can they do that? This is not justice."

Mumford was released from custody about two hours later.

Ammon Bundy and his brother, Ryan, will remain in custody because they are still facing charges in Nevada stemming from a high-profile 2014 standoff with federal agents trying to round up their father Cliven Bundy's cattle.